Vaping: E-Liquid Chemical Linked to "Popcorn Lung" Harms Cells in Airways | Inverse

In 2007, health officials in California revealed that numerous workers in local flavoring factories suffered from a rare, life-threatening lung condition called bronchiolitis obliterans, later nicknamed “popcorn lung.” The illness, which scars the air sacs of the lungs and makes breathing difficult, stemmed from exposure to diacetyl, a yellow chemical used to give microwave popcorn its buttery flavor. ....
https://www.inverse.com/article/52946-popcorn-lung-chemical-diacetyl-found-in-vape-juice